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So I read through all of the replies, and I've pondered this a bit. JF, life is not about being happy. It's about being blessed. Before anyone launches on me, I want to state, I am a Christian, God is very real in my life, I wish He would go away a lot, but these days I feel like a towel in His washing machine.
Happiness is bogus. Children are happy because adults who know better make it so. Adults know better.
I decided, see above, to let God plan my family. For all of you out there with your heads exploding or trying to understand, just roll with it. After 40+ years in engineering/software I have been unemployed for 1 week followed on by two desperate job offers. I have seen a lot of crap in my life as all of you have. so, back to my point...
Count your blessings. When you - all of you - stop doing that you ignore providence. Be humble and plow on.
We get too attached to tech. Go get some chickens.
Peace to all of you
<edit>
I wanted to add one thought - all of us get caught up in the urgent and do not focus on what is important. I'm speaking from some serious experience here. If you are working so hard that you are not happy, or feeling blessed or lacking something - and a lot of us are working hard to provide - take a hard look at your expenses and priorities. That son or daughter shadowing you while you go work on the car? The car is urgent, the child is important.
Trust me on this.
Charlie Gilley
βThey who can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.β BF, 1759
Has never been more appropriate.
modified 19-Oct-23 16:22pm.
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charlieg wrote: So I read through all of the replies, and I've pondered this a bit. JF, life is not about being happy. It's about being blessed. Before anyone launches on me, I want to state, I am a Christian, God is very real in my life, I wish He would go away a lot, but these days I feel like a towel in His washing machine. Dude, I'd never laugh at you for being a Christian or feeling blessed. In fact I'd have very strong words towards someone who did. I'm not a religious type person, but I've learned in life that God does exist and blessings do happen.
charlieg wrote: Happiness is bogus. Children are happy because adults who know better make it so. Adults know better. That's where we disagree, buddy. Happiness is not bogus. It's something you gotta work for each and every day. Peeps make it sound like it's mutually exclusive to any other thing in life, but it's not. I promise. lol
charlieg wrote: Count your blessings. When you - all of you - stop doing that you ignore providence. Be humble and plow on.
charlieg wrote: We get too attached to tech. Go get some chickens. Deal
charlieg wrote: The car is urgent, the child is important. 100% man
Jeremy Falcon
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#Worldle #635 4/6 (100%)
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https://worldle.teuteuf.fr
"A little time, a little trouble, your better day"
Badfinger
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Is there a connection between Longhorn and the worst code? Like was the worst code part of Longhorn?
The difficult we do right away...
...the impossible takes slightly longer.
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Hung up on hearing a dodgy writer expired. (9)
Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012
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I like it
In a closed society where everybody's guilty, the only crime is getting caught. In a world of thieves, the only final sin is stupidity. - Hunter S Thompson - RIP
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Ok I'll take it
Suspended
pretty self explanatory
In a closed society where everybody's guilty, the only crime is getting caught. In a world of thieves, the only final sin is stupidity. - Hunter S Thompson - RIP
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YUAThursday.
Paul must be really ill!
Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012
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I think he is Peter he hasn't posted since last night which is not like him
In a closed society where everybody's guilty, the only crime is getting caught. In a world of thieves, the only final sin is stupidity. - Hunter S Thompson - RIP
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Wordle 851 5/6
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Wordle 851 X/6
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No luck.
βThat which can be asserted without evidence, can be dismissed without evidence.β
β Christopher Hitchens
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Wordle 851 3/6
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Wordle 851 3/6*
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Happiness will never come to those who fail to appreciate what they already have. -Anon
And those who were seen dancing were thought to be insane by those who could not hear the music. -Frederick Nietzsche
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In a closed society where everybody's guilty, the only crime is getting caught. In a world of thieves, the only final sin is stupidity. - Hunter S Thompson - RIP
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Wordle 851 4/6
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Ok, I have had my coffee, so you can all come out now!
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Wordle 851 3/6
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"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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How are you feeling Paul ? I'm suffering more than I usually do
In a closed society where everybody's guilty, the only crime is getting caught. In a world of thieves, the only final sin is stupidity. - Hunter S Thompson - RIP
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I was rough as a very rough thing from the planet RoughIsUs.
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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Wordle 851 5/6
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Jeremy Falcon
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Wordle 851 4/6
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Wordle 851 5/6
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"A little time, a little trouble, your better day"
Badfinger
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Disclaimer: I know next to no theory and math behind heat pumps, solar panels and such. I have heard of 'carnot engines', but never learned enough math to understand the theory. So these thoughts come from an ignorant amateur .
In 20 years, solar panels have improved their efficiency by a few percent points, from slightly below 20% to slightly above. I am talking about commercial, affordable panels - not what is demonstrated as lab prototypes.
Solar heat collectors can pick up well above 80% of the radiation energy. Furthermore, they are far less dependent on the direction to the sun, and collect a fair amount of energy even in diffused light, when the sun is hidden behind a cloud. Problem is that we get it as heat. Electricity is much more generally useful. So is there a way to get more electricity than the 20% from solar panels?
I came across this 'Betz law', setting a theoretical limit on a wind turbine: It can at most take 59.3% of the kinetic energy of the wind. Again, I do not understand all the math, but it makes intuitive sense: If all the kinetic energy were tapped out, the air would stop completely immediately behind the wind turbine, having to pile up to quite some heap of air. It must retain a minimum of kinetic energy in order to get out of the way. I trust the calculations of Albert Betz, that this requires a very minimum 40.3% of its original energy.
A hydropower water turbine in open air doesn't have this limitation: The water jet hits the turbine blades to set it spinning, and ideally transfers all its kinetic energy to them, falling vertically of the blades, driven by gravitation only. The water gets out of the way, without blocking the water following behind it. Hydropower turbines have an efficiency of 95% or more.
So I get this - probably crazy - idea:
Take a glass tube, strong enough to take both some heat and some gas pressure. Make a fresnel cylinder lens the langth of the tube: It need not be of high optical quality, but e.g. a thin plastic board, to collect all the sun hitting it, as a burning stripe in the glass tube. You could insert a coal black ceramic rod in the center of the tube, to absorb as much heat as possible.
Lay the tube horizontally, and fill it partially with a fluid that will evaporate and create a gas pressure when heated by the sun. Mount the fresnel cylinder so that its burning stripe hits (the black absorber in) the tube. When the fluid starts boiling, let the pressure out of the glass tube through a vent to a nozzle aimed at a gas turbine with an electric dynamo. The gas will not be much above the boiling point for the liquid (it has just evaporated and escaped through the vent without significant further heating). So when it hits the turbine blades, giving off some of its energy to them, it cools down and condenses to a fluid, that can be pumped back into the glass tube for a new round of evaporation. As it has just condensed, it will be not much below its boiling point. It shouldn't take that much solar energy to evaporate it - the evaporation energy, of course, but little energy for heating it up to its boiling point. The glass tube, turbine chamber and pumping the fluid back to the glass tube makes a closed circuit.
Assuming that the gas condenses when loosing energy to the turbine, maybe Betz law doesn't apply, or not fully, since the condensation will reduce the gas pressure on the back side of the turbine. Even if Betz applies, a theoretical 59.3% is still three times the 20% from solar panels. If you need some heat as well, you migth lead away some of the heat energy, the one that couldn't be transformed to electricity, to where you need the heat. That would probably have a good effect on the condensation of the gas, to reduce the gas pressure, and facilitate pumping the fluid back to the glass tube. The combined energy extracted, the electricity from the turbine dynamo plus the heat tapped from the condensation chamber, could possibly exceed the Belz limit for turbine alone.
There may be fluids far better suited than water for such an evaporate - turbine - condense closed circuit. That doesn't affect its principal operation.
For all I know, solar electricity generators working according to this principle may be commonplace. Or my crazy idea may be original. Or there may be some theoretical obstacle that makes the idea completely worthless.
Does this idea have any merit at all?
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